Hex #664200 or rgb(102,66,0) in RGB space is the tint of khaki. It has hue angle of 38.82 degrees, value = 40 and saturation = 100. #664200 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of red, 1 drop of green, 5 drops of black.
Nearest safe hex - #663300. Below you can see the block with #664200 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664200 to the mixer and play with it.